This is contrast to a spacecraft' s main engine, which is only capable of providing thrust in one direction, but is much more powerful. RCS systems often use combinations of large and smaller (vernier) thrusters, to allow different levels of response from the combination. An RCS system is capable of providing small amounts of thrust in any desired direction or combination of directions. High Quality Content by WIKIPEDIA articles! Its purpose is attitude control and steering. A reaction control system, abbreviated RCS, is a subsystem of a spacecraft. An RCS is also capable of providing torque to allow control of rotation (pitch, yaw, and roll).
Reaction Control System
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Lambert M. S.
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